Asus has been making the rounds in social media, building up hype for the Zenfone 4. The latest is a teasing peek at the back of the phone and its dual cameras. The photo features spokesperson Gong Yoo and sets the unveiling date to August 17.

Asus Zenfone 4 teaser image starring Gong Yoo

This will be one of several “Zenfone 4″ devices, the Zenfone 4 Max is already official and there should be two more devices – the blue Zenfone 4 Pro (S835, 5.7” QHD AMOLED, dual camera) and the single cam device in red.

By the way, the August 17 event is in Taiwan, there’s a European event…